Soft lockup BUG warning from syslog


Hi all

I’m trying to resolve a warning message about a bug that appears via SSH and terminal window on the server. My Yunohost server is slow, but most things are working. See below for more.

My YunoHost server

Hardware: Old Mac Mini
YunoHost version: 11.1.19
I have access to my server : SSH, webadmin, server terminal window
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no

Description of my issue

What I am trying to achieve
I would like to find and fix the source of the error messages.

The context
These messages have been consistently arriving since late May. Sometimes there are 10 of them in a row, sometimes three in a row.
If I ctrl+c I can get a command prompt and do whatever I need to, so I have been (naughtily) ignoring them until now.

what I tried

  • Look on the forum for similar issues - none found
  • Look in webadmin tools/logs for clues - none found
  • Look in webadmin services for a related service to grab logs of - none found

error messages
Each message has the same syntax:

kernel:[ <number1>.<number2>] watchdog: BUG: soft lockup - CPU#0 stuck for 22s!

The full error log recently is this:

 kernel:[ 3593.858525] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:0]

Message from syslogd@yunohost at Aug  9 19:53:41 ...
 kernel:[ 3886.114111] watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [swapper/0:0]

Message from syslogd@yunohost at Aug  9 19:53:41 ...
 kernel:[ 3886.114118] watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [swapper/1:0]

I’m wondering if I can ‘kill -9’ something, as @Aleks instructed, to remove these soft lockup warnings (and the thing that is making them).


  • how can I find the cause of these warnings?
  • how can I find more information about the numbers in the error messages?

Thank you for reading, and please share ideas if you have some about what might be a cause of the warnings. Thanks! :grin::hand_with_index_finger_and_thumb_crossed:

This is most likely hardware-related, and in your case VM-related, but let’s try to help you anyways.
May you share your Diagnosis report? Specifically I want to know about your memory and swap(s).

(I’m loosely following what I found online with these keywords, namely kernel - watchdog: BUG: soft lockup - CPU#6 stuck for 23s - Ask Ubuntu and linux - Ubuntu VM hangs in VirtualBox under Window 10: "watchdog BUG: soft lockup - CPU#0 stuck for 23s" - Super User )


Hi @tituspijean

Thank you for your patience with me! :green_heart:

I understand now, from the link you shared, how it’s my VM settings.

Something else to learn about and look into.

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